Science Resources

General Resources
Wikispecies - A free open directory of species.
Science Daily
How Stuff Works
Scientific American
New York Times -- Science
PopSci
Science News - Magazine of the Society for Science and the Public
Smithsonian.com--Science and Nature
Brain Pop Science
Exploratorium
PhET Interactive Simulations - An extensive suite of simulations to improve the way that physics, chemistry, biology, earth science and math are taught and learned.
Exploratorium - real world applications including optical illusions
Teachers' Domain - large collection of digital media
PBS Teachers
GraphPad - enter numerical values to create your own graphs
Nobelprize.org - try the educational games!
nclark.net - "awesome" biology and chemistry resources

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Biology
Teachers First Biology & Life Science Resources
Learner's TV Biology Resources - Biology Animations
Learn Genetics Virtual Labs
Online Genetics Labs
Biology Corner

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Chemistry
Teachers First Chemistry Resources
Build Atoms Yourself
Learner's TV Chemistry Resources - Chemistry Animations
The Science Spot Chemistry Lesson Plans

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Physical Science

Wave Simulation
Roller Coaster Physics - investigate velocity, potential energy, and kinetic energy in roller coaster design